Antenna for radio transmission and reception



Jan. 3, 1939.

W. WHITE FOR RADIO TRANSMISSION AND RECEPTION ANTENNA Filed April 15,1938 Patented Jan. 3, 1939 ANTENNA FOR RADIO TRANSMISSION AND RECEPTIONWilbur White, Salamanca, N. Y.

Application April 13, 1938, Serial No. 201,678

Claims.

This invention presents an improved antenna for radio transmission andreception.

It is a well recognized fact that radio frequency currents, particularlyof the higher fre- 5 quencies, travelling along an antenna conductoractually flow almost in their entirety along the exterior surface of theconductor and not through the entire cross section or core of theconductor. As a result it has been found that tubing may be employed forcarrying these currents with as great, if not greater, efliciency thanordinary wire. However, this so-called skin effect requires that theconductor have an insulation or coating of some kind over the coppergenerally used in its make-up in order to prevent corrosion of theconductor such as would increase its resistance to the flow of current.Another well known fact in the radio art having a bearing on thisinvention is that the collection of rain or moisture of any kind on anantenna not only causes losses and variation in impedances in thematched impedance feed systems generally used but also in the colderclimates the collection of moisture and the freezing thereof oftenrenders the antenna system wholly inoperative.

With the foregoing facts in mind it is the prime object of thisinvention to provide an antenna or conductor in which means is providedfor maintaining a film of oil glycerine, alcohol or other liquid on theconductor such as will prevent corrosion and consequent increase inresistance, will prevent the collection of moisture and prevent freezingor formation of ice on the conductor.

A further object is to provide an antenna of this kind wherein a tubularconductor is employed and a fabric wick is run entirely through theconductor with its ends placed in reservoirs formed in the endinsulators and filled with the oil or other liquid so that the wick willcarry the oil along the entire length of the conductor.

The foregoing and other more detailed objects of the invention will bemade apparent in the course of the following specification, referencebeing had to the accompanying drawing wherein:

Figure 1 is a side elevation of the improved antenna, one of the endinsulators being shown in section. Y

Figure 2 is an enlarged detail plan view of one end of the antenna.

Figure! 3 is a cross section along the line 3-3 in Figure 2.

Figure 4 is a fragmental enlarged view of a modified form of conductor.

Referring now with more particularity to the drawing my invention isshown as embodied in the form of a simple antenna A supportedhorizontally between insulators B and C. It is understood, however, thatmy invention may be used in any form of antenna system for both theradicating and collecting parts and the feeder 5 systems therefor.

The antenna A comprises a tubular metallic conductor 5 of the properlength and formed at its ends with loops 6 for fastening to the eyes 1of the insulators B and 0. Near each loop 6 10 an opening 8 is formed inthe wall of the conductor 5 and a long cotton or other fabric, wick 9 isthreaded through these openings and through the entire length of theconductor. The Wick 9 is of such length that its ends III will 15 extendfreely from the openings 8.

The insulators B and C are each formed with an upwardly openingreservoir well or cup ll into which these free ends in of the wick 9 areplaced and coiled up as shown. 20

The reservoirs l I are filled with a non-freezing liquid such as oil,alcohol, glycerine or the like and, as a result, the wick 9 will carryor feed the liquid through the conductor 5 by action of capillaryattraction. 25

Preferably the conductor 5 is perforated along its length by smallopenings I2 formed through its walls and the liquid carried by the wick9 will thus maintain both the interior and exterior surfaces of theconductor in a moistened condition.

This action will prevent corrosion of the conductor and will therebygreatly facilitate the flow of current therealong. The film of theliquid developed on the conductor will also prevent 35 the collection ofeither moisture or ice on the antenna and will thus facilitate bothtransmission and reception.

It is understood that I may vary from the speciflc structure herein setforth, provided that such 40 variations fall within the scope of theappended claims.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is:

1. An antenna comprising a tubular conductor, insulators secured at theends of the conductor, the said insulators having reservoirs for aliquid, and a wick extended through the conductor and placed at its endsin the reservoirs. 50

2. An antenna comprising a tubular conductor, insulators secured at theends of the conduc tor, the said insulators having reservoirs for aliquid, and a wick extended through the conductor and placed at its endsin the reservoirs where- 55 by the liquid therefrom will be conductedthrough the conductor.

3. An antenna comprising a tubular conductor, insulators secured at theends of the conductor, the said insulators having reservoirs for aliquid, and a wick extended through the conductor and placed at its endsin the reservoirs whereby the liquid therefrom will be conducted throughthe conductor and the said conductor having per- 10 forations throughits walls.

4. An antenna comprising a tubular conduc-

